You can also disable notifications for individual apps in a single standard place, even if they're traditional desktop apps. (howtogeek.com)
This will allow you to disable notifications from certain apps which keep popping up automatically quite frequently and turn your display on. (phoneradar.com)
To disable the notification sound for the selected app, click the «Play a sound when a notification arrives» slider button so it turns white and reads Off. (howtogeek.com)